Machine for forming hollow building-blocks.



PATENTED JUNE 7, 1904.

J.'H. HENDRICKSEN. MACHINE FOR FORMING HOLLOW BUILDING BLOCKS.

APPLICATION FILED APR. 16. 1903.

2 SHEETS-SHEET 1 N0 MODEL.

' JEN/522w:

ooo-oooi UNITED STATES Patented June '7, 1904.

PATENT OFFICE.

MACHINE FOR FORMING HOLLOW BUILDING-BLOCKS- SI'ECIFICATION forming partof Letters latent No. 762,054, dated June '7', 1904.

Application filed AprillG, 1903. Serial No. 152.979. (N0 model.)

To all whom it may concern.-

land, in the county of Guyahoga and State of Ohio, have invented certainnew and useful Improvements in Machines for Forming I-1ol lowBuilding-Blocks; and I do hereby declare the following to be a full,clear, and exactdescription of the invention, such as will enable othersskilled in the art to which it pertains to make and use the same. 7

My invention relates to machines for forming hollow building-blocks.

The objects of the machine are to form a building-block of the type setforth of greater density and more uniform throughout- My inventionconsists inthe employment of movable compression means, preferablyoperated by hydraulic pressure and operating from two opposite sides.and the upper side on the block, in combination with an adjustable core.

My inventionalso consists in other details and combination of parts, aswill be hereinafter fully set forth and claimed. 7

1n the drawings, Figure I is aview in front elevation of a machineembodying my invention, certain parts of the frame being broken away tobetter illustrate some of the details.

Fig. 11 is a view in end elevation looking at the machine toward theright of Fig. 1. Fig.

-111 is a longitudinal sectional'view taken through the block-mold, thecore-pieces, and

a block after the same has been compressed and illustrating in plan thetable of the machine. Fig. 1V is a fragmental view of the machine, infront elevation, illustrating the core-plate withdrawn, the front plateof the mold open, the parts being in position assumed after the blockhas been formed and V 7 sary pressure. Be it known that 1, JOHN H.HnNDRIcKsEN, a citizenof the United States, residing at Cleve- Each ofthe presses A, B,

and C is provided with pistons A B and C which operate within thecylinders of said presses in the usual manner characteristic ofhydraulic presses, and each of the presses is supplied with feed-pipesa, b, and 0, respectively, controlled by suitable valves connectedtogether or not, as found necessary or desirable. The pistons A", B and(J of each of the presses are each provided with a check-bar (Z, thesame being adjustable by means of screwthreads and nuts cl (Z (see Fig.IV) for limiting the inward movement or extent of movement of thepistons. The lugs which engage the check-bars (Z arec c, the formerbeing connected to the cylinder of the press and the latter to thepiston. (See Fig. IV.) To each of the check-bars (Z is secured a cablef, which passes over a pulley f and at its end is attached to a weightF. 1 find this the preferable manner of gaging the stroke of the pistonsand returning the same to their normal position or out of contact withthe mold; but

.other means may be employed and suggest themselves without departingfrom my invention.

Gr represents the mold within which the block is formed and pressed.This mold G is composed of a solid end g, a removable end g, (see Fig.11,) a removable bottom plate and a top plate g. The top plate g isprovided with upwardly-projecting flanges designed to receive and retainan excess of material to be compressed as the blockis formed. The top,plate is loosely placed upon the upper end of the mold, being mainlyheld in position by removable pins g and bolts (see Fig. 11) and issustained in position also through the plunger A secured to the pistonA. This plunger A forms the top compressible portion of the mold G andhas more or less range of vertical movement, which will allow of themold being filled as the plunger is raised. The face of the plunger A isrecessed, as at a to receive the upper end or ends of the core or coresJ, of which there may be any suitable number, depending upon the desiredinternal formation of the block. (See Fig. 111.) It will thus be seenthat the core or cores J will extend within the face of the plunger A assaid plunger descends, and the orifices formed in the block will becontinuous from bottom to top. The cores J are secured to a plate J, towhich they are removably attached, preferably by means of bolts 7', sothat other cores can replace them according to the desired inner contouror coring of the block. The plate J is in turn secured to a piston-rodK, which operates with a piston located in hydraulic cylinder K. Thecharging of the cylinder K with water lifts the cores to position, (seeFigs. I and IL) and the discharging of the cylinders K allow said coresto drop out of the mold, as illustrated in Fig. IV. Plates L and M formthe compressing sides of the mold G, acting in conjunction with theplunger A to compress the material within said mold. The plates L and Mare removably secured to the pistons B 0 and one of them, such as M, maybe provided on its face with a suitable pattern, which will give to theface of the block a configuration of any suitable pattern. This plate isremovable, and another may be substituted in its place, either'plain orhaving a pattern. The front plate g and the bottom plate are bothremovable from the mold, the former for the purpose of allowing theremoval of the block from the mold after the block has been formed andthe pressure removed and the latter to sustain the block as it isremoved, preventing any straining or contortion of the same. The blockwhen removed is placed upon a suitable cable or carrier and the plateremoved therefrom and then replaced in the mold, or, if desired or foundnecessary or convenient, a number of substitute plates g may be providedand a block allowed to rest on said plate after removal until it hasset.

The operation of my machine is as follows: A predetermined amount ofproper mixture is fed to the mold Gr, the mold being in approximatelythe condition illustrated in Fig. 1V and the cores J having beenpreviously elevated, as illustrated in dotted lines in said figure, thefront plate 9 also having previously been secured in place by means ofpins g and a key (See Fig. II.) The first action now is to lower theplunger A" a certain predetermined distance into the mold G, then bringinto action the hydraulic presses B C, throwing their plungers inwardly,which will bring all three plungers into action, compressing the blockor the material of which the block is composed in a compact and uniformmanner. After this has been accomplished the plungers are withdrawn, asare also the cores J, which are preferably made slightly tapering, thefront plate 7 is removed, the top 1 is slightly loosened, and the blockN, with the plate g is slid from the press. This operation is continued,forming blocks of uniform construction and strength and in an economicalmanner.

In setting forth thisinventionI have shown and described certain detailsand assemblages as I have found them best adapted to perform therequired service or function; but I do not hence wish to be limited tothese details or assemblages, as it is apparent to any one skilled inthe art that they may be modified, and in some cases it may be foundnecessary to make slight modifications.

hat I claim is- 1. In a machine of the type set forth, a mold comprisinga plunger, compressible sides and top, a core-piece attached to saidplunger, said core-piece being removable.

2. A mold comprising a stationary end wall, and a removable end wall, acored removable bottom plate, a cored top plate loosely mounted, andslidably-mounted side walls, in combination with a plunger operatingthrough the cored top plate, a core movable through the cored bottomplate, and pistons connected to the movable side walls for forcing theminwardly between the top plate and bottom plate.

combination with the mold, comprising a stationary end wall, and aremovable end wall, a cored removable bottom plate, a cored top wallloosely mounted on the end walls, and provided with anupwardly-projecting flange, and slidably-mounted side wallsoperatingbetween the top and the bottom plates, of a plunger operatingthrough the cored top plate,

and having its underneath face recessed, a core movable through thebottom plate, and adapted to have its upper end engage in the recessedface of the plunger, and pistons connected to the side plates for movingthe same inwardly to compress the material in the mold.

4. In amachine of the type set forth, a mold comprising end walls, bothof which are stationary during the compressing operation, and one ofwhich is removable to permit the removal of the compressed block, acored removable bottom plate, a cored top plate, and slidably-mountedsidewalls, a plunger operating through the cored top plate, coresoperating through the cored bottom plate and engaging with the plungerwhen the latter is lowered, pistons connected to the side walls foroperating the same, and means for limiting the movement imparted to theside walls.

5. In a machine of the type set forth, in combination with a mold and acompressing means operating therein, said means embodying cylinders withplungers slidable therein, and limiting means therefor comprising lugsmounted on the plungers and cylinders respectively, rods having one oftheir ends secured to one of said lugs and means movable longitudinallyon said rods for engagement with the other of said lugs.

6. In a machine of the type set forth, a mold comprising end walls, sidewalls movable therebetween, and top and bottom plates 3. In a machine ofthe type set forth, the

formed With openings, in combination With oppositely-disposed plungers,and a core actuated by one of said plungers through the openings of saidplates into the other plunger, substantially as described.

7 In a machine of the type set forth, the combination With a mold,comprising a stationary and aremovable end Wall, and a cored removablebottom plate, a cored removable top plate, and slidable end Walls, of aplunger operating through the cored top plate, acore operating throughthe cored bottom plate, pistons connected to the side Walls for forcingthe same inwardly toward each other to compress the material in themold, and means for retracting the pistons and side Walls, comprisingrods attached to said pistons, and Weighted cables attached to the freeend of said rods, and means for limiting said retracting movement.

' Signed at Cleveland, in the county of Guyahoga and State of Ohio, this7th day of April, 1903.

JOHN H. HENDRICKSEN.

Witnesses:

E. B. DONNELLY, W. E. DONNELLY.

